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    Thyroid. 1994 Fall;4(3):249-54.

    Resistance to thyroid hormone in subjects from two unrelated families is associated with a point mutation in the thyroid hormone receptor beta gene resulting in the replacement of the normal proline 453 with serine.

    Refetoff S, Weiss RE, Wing JR, Sarne D, Chyna B, Hayashi Y.

    Department of Medicine, University of Chicago, Illinois 60637.

    Resistance to thyroid hormone (RTH) is a condition of impaired tissue responsiveness to thyroid hormone characterized by elevated free thyroid hormone levels in serum accompanied by nonsuppressed TSH. RTH has been associated with mutations in the thyroid hormone receptor (TR) beta gene. We report studies carried out in 9 members of a family (F94) of Jewish ethnic origin and a single subject of Mexican origin. All subjects fulfilling the criteria of RTH (6 of family F94 and one of family F27) had the same point mutation in the T3-binding domain on one of the two alleles of the TR beta gene. This mutation resulted in the replacement of the normal proline-453 with serine (P453S). Nevertheless, the clinical characteristics of affected members of each of the two families differed as did the severity of hormonal resistance in terms of responses to the administration of L-T3. Genetic studies indicate that the same mutation occurred independently in each of the two families.

    PMID: 7833659 [PubMed - indexed for MEDLINE]

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    • Thyroid (Armour® Thyroid)

      Thyroid is a hormone produced by the body. When taken correctly, thyroid is used to treat the symptoms of hypothyroidism (a condition where the thyroid gland does not produce enough thyroid hormone). Symptoms of hypothyr...

    • Levothyroxine (Levothroid®, Levoxyl®, Synthroid®, ...)

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